When auscultating a client's heart sounds, the nurse hears a louder S2 when listening at the 2nd intercostal space right sternal border. The nurse determines that this finding is consistent with the closure of which heart valves?

A) Tricuspid and mitral: The tricuspid and mitral valves are best auscultated over the areas where the heart's valves are closest to the chest wall, specifically at the lower left sternal border and the apex, respectively. A louder S2 in the 2nd intercostal space right sternal border does not indicate the closure of these valves. B) Mitral and aortic: The mitral valve is auscultated at the apex, and the aortic valve is best heard at the 2nd intercostal space right sternal border. While a louder S2 may be associated with the aortic valve, it is not consistent with the mitral valve. C) Aortic and pulmonic: The aortic valve and pulmonic valve are located in the areas where S2 (second heart sound) is predominantly heard. The aortic valve is located at the 2nd intercostal space right sternal border, and the pulmonic valve is heard at the 2nd intercostal space left sternal border. A louder S2 in the 2nd intercostal space right sternal border indicates a louder closure of the aortic valve and potentially the pulmonic valve as well. D) Pulmonic and tricuspid: The pulmonic valve is auscultated at the 2nd intercostal space left sternal border, while the tricuspid valve is heard best at the lower left sternal border. A louder S2 in the 2nd intercostal space right sternal border does not indicate the closure of the tricuspid valve.